Ultimate Vegan Grilled Cheese Sandwich

Name: Ultimate Vegan Grilled Cheese
Prep time: 25 min
Cook time: 5 min
Total time: 30 min
Ingredients: 1/4 cup raw cashews; 1 tablespoon tapioca starch; 1 tablespoon nutritional yeast; 1.5 teaspoon apple cider vinegar; 1/4 teaspoon sea salt; 1/2 cup water; 6 slices whole grain sliced bread (or your choice); 1-2 tablespoons vegan butter (optional); tomato slices (optional); avocado slices (optional)